Method for making pouches
US9902516B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jan 29, 2015 |
| Grant date | Feb 27, 2018 |
| Priority date | — |
| Expiry date | May 15, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65B2039/009
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
The present invention relates to a method for making pouches providing a continuous web; folding the web to provide confronting side surfaces joined along a bottom edge; forming a vertical seal between the confronting side surfaces, thereby providing a series of adjacent pockets having opposite side walls with each pocket having an unsealed opening along a top edge; filling the pockets through the unsealed opening with material; sealing the unsealed opening. In the inventive method, which facilitates handling of the continuous web forming the pouches, the web is perforated by a perforation between a leading length piece of the web adapted to form a leading pocket and a trailing length piece of the web adapted to form a trailing pocket, and the distance between a trailing edge of the leading length piece and a leading edge of a trailing length piece is increased for tearing the leading and the trailing lengths pieces apart at the perforation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.